Sepiolite stone is a fibrous water content of magnesium silicate, was usually white, gray, yellow and other colors, opaque, not glossy. Some of them are shaped like earth, some as a surprising hull-shaped or nodular. Under the electron microscope, it can be seen them together by numerous filaments arranged in sheets. Sepiolite stone has a surprising feature, when they hit the water will absorb much water to soften up, and once dried to further hardened. Sepiolite is primarily used to make pipe. It is formed by deposition or alteration made of serpentinite. Leping Jiangxi China, Liuyang, Hunan and other places are output. Leping bull Ridge is the first of sepiolite were found. Geological Survey of sepiolite clay began in chapter one Jun, 1947, he and the bleaching effect of chemical analysis based on the "fire clay" named sepiolite, and discuss the causes of the deposit.